Inner tube for pneumatic tires



J. J. VOORHEES, JR.

INNER TUBE FOR PNEUMATIC TIRES. APPLICATION-FILED MAY I8, 1917. I

1,3 ,173,- I I Patente d Apr. 6,1920.

' j STATES PATENT orrxcn.

Joint a. voo, m, or mean crrr, mew JERSEY, assreuoa, 'BY H 1-:

mus, TO U. 8. OOIPRESSION INNER TUBE COMPANY, 01" TULSA, OKLAHOIA, A.

CORPORATION 01 .DELAWABE.

INNER TUBE FOR PNEUMATIC TEES.

Specification of Letters Patent.

Patented Apr. 6,1920.

Application filed lay 18, 1917. Serial No. 189,522.

To all whom. it may concern Be it known that I, JOHN JAY-.VOORHEES, Jr., a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Inner Tubes for Pneumatic Tires, of which the following is a specification.

This invention relates to inner tubes for pneumatic tires. It is well known that if inner tubes are run while in a deflated condition such an endwise pull is imparted to stem is held against movement with the being pased through the felly and the wheel to .which the tire 1s ap tube b rim 0? plied.

It is a primary object of the present invention to provide a tube constructed in such manner that it will not have its valve stem torn out, if for any reason itis run in a deflated condition. object is .accomplished in a two-fold manner.- First, by

constructingthe tube in such a way that the valve stem receiving portion thereof, is brought outof alinement with, or off-set from the general inner ripheral rim en- 1-1; portion of the tn and second by ding reinforcing layers of canvas in the material of the tube, said layers bein of varying lengths and being so arm as successively to take up any longitud i ii al strain caused by the tube being run in a deflated condition.

A further object of the invention is to provide a tube as above set forth, having its rim portion so constructed that while the rim engaging portion of the tube will be, in a measure, anchored with respect to the 'inclosing casing to thereby preserve the proper relation of the tube and easing during the a plication of the tire to the wheel, said tu will be capable of a limited to permit equalization of the compression when the improvements are embodied in what are known as oomprewion inner tubes, of which is placed under compression when the tube is inflated to thereby render the tube self-healing if un Further objects and advantages of the i. e. inner tubes, the material invention will be set forth in the detailed description which now follows.-

In the accompanying drawings Figure 1 is a transverse sectional view through an inner tube and its casing, said inner tube bein constructed in accordance with the invention.

Fig. .2 is a fragmentary longitudinal sectional view through the tube at the valve stem receiving portion thereof, and

Fig. 3 is a partial transverse sectional view taken upon line 3-3 of Fig.'2.

Like characters of reference designate corresponding parts in all of the figures of the drawing.

Referring to the drawing, A desi ates a tire casing of the usual form and designafes'the mner tube thereof.

-' I preferably embody the improvements in a tube having continuous annular depressions 10 and 11 in its opposite sides and a continuous annular depression 12 in its .14 which preferably form annular outwardly projecting looped portions, for contact with the inner wall of the casing. The depressionslO and 11 are separated from each other at the rim side of the tire by bearing portions, which include walls 15 and 16 and which are oppositely inclined and lie against the casing at the rim side of the latter.

These walls, in a'measure, anchor the tube in proper relation to the casing, but in order that such necessary slight movement may take place as to best equalize the compression throughout the material of the tube, the rim engaging portion is rounded or curved at 17. While I have thus illustrated and described a compression inner tube with which my valve stem protecting and reinforcing fea tures are employed, it will be ap rent that my method of protecting the va ve stem is of value in any type of inner tubes. In carrying out the invention I transversely recess or cut out the inner peri heral rim eugag'ng part 18 of the tube as indicated at 19 m 1 .tube, but that I b' ing opening the valve stem receiving opemng inner peripheral tube as much or slightly more than it is recessed at 19. It'will, therefore, be seen that I maintain the necessary thickness of the the valve stem receive 21 out o longitudinal alinement with the part 18, or in other words, that is formed in an ofi-set portion of the tube. In addition to forming this ofl-s'et, as described,I- embed in the material of the tube, about the.

ralvesstcm receiving opening 21, layers of canvas or other reinforcing material 22, 23, 24- and 25, each successive layer being slight] longer than the layer receding it. As is illustrated in Fig. 1, all o layers terminate transversely at approximately the same part of the tube, namely, at the beginning of the side depressions, but the exact width of these layers and the exact point of their termination is immaterial since they are designed to resist longitudinal rather than lateral strain.

If a tube formed as above described is run in a deflated condition the tendency of the tube is to crease and fold circumferentially of the wheel which results in imposing a. very considerable longitudinal all u n the rtion of e tu In my construction t is poll is first taken up by the increased thickness of rubber and then successively taken upby the reinforcing strips 25, 24,23 and 22. This in addi-' tion to the transferring of the strain from one longitudinal center to another longitudinal center so reduces the ultimate pull upon the valve stem as to prevent the valve ened portions and extending beyond-the restem from being torn loose from the tube.

It is to be understood that the invention may be embodied in other forms than that herein shown which is merely illustrative and that it includes within its purview such modifications as come within either the spirit or the terms of the appended claims.

Having described my invention what I claim is a 1). An inner tube for pneumatic tires, having its valve carrying -fportionoffset from the remainder of the tube.

2. An inner tube for pneumatic tires, having its valve carrying rtion ofi-set from the remainder ofthetu said off-set portion having. a reinforcing member therein which extends through the off-set portion and into the undistorted body portion of the tube.

3. An inner tube for neumatic' tires having a molded off-set valire' portion, said olfset portion havinga plurality of reinforcing members embedded therein and extending through'the ofi-set portion and followi'ngthecontour ofthetube wallmtothe undistorted portion of the tube.

4. An inner tube for tie tires, having its valve carrying ofi-set from the reminder of the said oil-set portion having a plurality of reinforcing-1mmbers of varying lengths embedded therein which extend through the off-set portion and into the undistorted rtion of the tube. inn-inflatable tube neunnfietires, recessed at its inner 'p side and constitute an olf-set valve carrymg portion,

' and a plurality of reinforcing webs of fabric embedded in and through said thickened tube.

8. An inflatable tube for pneumatic tires, recessed at its inner peripheral side and thickened opposite-said recessed portion to constitute an ofi-set valve carrying portion, and a plurality of reinforcing webs of fabric of varying lengtlm embedded insaid thickcessed portion of the tube.

9. An inner tube for pneumatic tires havingl a valve section provided with a pinra 'ty of reinforcing members embedded entirely within the main body of the tube, and terminating at different. points, in the length thereof, the number of reinforcing thickened opposite said portion to portion into the undistorted portion oft-he members decreasing at cm sections taken at ints successively from the center of the va ve section and in the length of the tube. 10. An inner tube for pneumatic tires having a valve section provided with a plurality of reinforcing members of graduated dimensions embedded entirely the main body portion of the tube.

In testimony whereof I aflix my signature in the presence of two witnesses.

JOHN J. VOORHEES, JR.

Witnesses:

Cmnnucn F. Hosxms, Fnm B. Palms-ion. 

